Patent US2063855A successfully refreshed from Google Patents.
US3554150A
Expired / Lapsed
US
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Method of forming heat exchange tubes
Assignee: Alstom Power Inc
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Filing: 1969-01-30
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Granted: 1971-01-12
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Expires: 1989-01-30
Abstract
Abstract A method of forming a heat exchange tube having an extended surface configuration impressed on the lateral sides thereof. A longitudinal embossing is formed on the surface of a plane sheet and the extended surface is impressed thereon prior to its being formed in a suitable die arrangement that locates a bend at a predetermined location marked by the longitudinal embossing.
Inventors
- 👤 George K Goetschius
- 👤 Edmund J Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:01
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046; B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0803; B21D; B21D53/00; B21D53/02; B21D53/04; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0391; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
The method of making a tubular member for a heat exchanger or the like from a substantially plane sheet of material comprising the steps of forming said sheet to include an embossed portion which connects opposite ends thereof, reversely bending said sheet along the crest of the embossed portion whereby the top outer surface of the embossing will become the inner surface of the tubular member, and joining together side edges of said sheet to comprise an enclosed tubular member having a predetermined configuration.
Claim 2
Independent Claim
84 words
The method of making a tubular member for a heat exchanger or the like from a substantially plane sheet of material comprising the steps of forming said sheet to include an embossed portion which connects opposite ends thereof, reversely bending said sheet along the crest of the embossed portion whereby the top outer surface of the embossing will become the inner surface of the tubular member, and joining together side edges of said sheet to comprise an enclosed tubular member having a predetermined configuration.
Claim 3
Dependent Claim
35 words
The method of making a tubular member as defined in claim 1 wherein said embossed portion is formed evenly on said sheet from one to the other end thereof to produce a continuously even bend.
Claim 4
Dependent Claim
34 words
The method of making a tubular member as defined in claim 1 wherein a form of extended surface is placed upon said sheet of material before it is bent along the embossed portion thereof.
Claim 5
Dependent Claim
33 words
The method of making a tubular member as defined in claim 3 wherein the extended surface comprises a corrugated form impressed upon said sheet of material before bending it into a tubular form.
Claim 6
Dependent Claim
30 words
The method of making a tubular member as defined in claim 4 wherein the form of extended surface impressed upon said sheet of material lies laterally adjacent said embossed portion.
Claim 7
Dependent Claim
25 words
The method of making a tubular member as defined in claim 3 wherein the extended surface lies laterally adjacent, opposite sides of said embossed portion.
Claim 8
Dependent Claim
41 words
The method of making a tubular member as defined in claim 1 wherein bending said sheet along the embossed portion thereof is effected in a bending die which concentrates a bending force along a line midway between sides of the embossing.
Claim 9
Dependent Claim
49 words
The method of making a tubular member as defined in claim 1 wherein the step of forming the sheet to include an embossed portion intermediate side edges thereof includes forming the edges of said sheet with a radius of curvature similar to that imparted to said embossed portion therebetween.
Claim 10
Dependent Claim
44 words
The method of making a tubular member as defined in claim 8 wherein said curved portion at the side edges of said sheet and the embossed portion therebetween are formed similarly and offset in the same direction from the principle plane of said sheet.
Claim 11
Independent Claim
116 words
The method of making a tubular member from a substantially plane sheet of material comprising forming said sheet of material to include a line of embossing at the side edges and an embossing in the form of a U-shaped undulation midway therebetween that extends uniformly between ends of said sheet, forming extended surface on the face of said sheet intermediate lines of embossing, reversely bending said sheet along the central embossing whereby the top outer surface of the embossing will become the inner surface of the tubular member, and joining together edges of the sheet at the sides of the embossing to comprise an open ended tubular member having extended surface on the lateral sides thereof.
Claim 12
Independent Claim
116 words
The method of making a tubular member from a substantially plane sheet of material comprising forming said sheet of material to include a line of embossing at the side edges and an embossing in the form of a U-shaped undulation midway therebetween that extends uniformly between ends of said sheet, forming extended surface on the face of said sheet intermediate lines of embossing, reversely bending said sheet along the central embossing whereby the top outer surface of the embossing will become the inner surface of the tubular member, and joining together edges of the sheet at the sides of the embossing to comprise an open ended tubular member having extended surface on the lateral sides thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |